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Are marathons too easy for you? Run one backwards.

By Matt Walks, Digital First Media

Updated:
09/25/2013 06:08:41 PM MDT

Are marathons too easy for you? Run one backwards. And juggle.

Most people can't run marathons. Even fewer can run them backwards.But for at least one man, Joe Salter of Pensacola, Fla., even that's not tough enough - so he juggles.Salter, 32, is a world-class joggler - that's a juggling jogger - which is a legitimate sport with championships and records. That's him running in the Quad Cities marathon in Moline, Ill., attempting to set a Guinness world record for time and distance.Here are a couple of Salter's eye-popping career accomplishments:Fastest ...